To learn which Apple Watch you have, use its model number:
To find your case size and more information, check the engraving on the back of your Apple Watch.
40mm Case Model: A2291, A2293, A2375
44mm Case Model: A2292, A2294, A2376
To find your case size and more information, check the engraving on the back of your Apple Watch.
40mm Case Model: A2351, A2353, A2355
44mm Case Model: A2352, A2354, A2356
To find your case size and more information, check the engraving on the back of your Apple Watch.
40mm Case Model: A2092, A2094, A2156
44mm Case Model: A2093, A2095, A2157
To find your case size and more information, check the engraving on the back of your Apple Watch.
40mm Case Model: A1977, A1975, A2007
44mm Case Model: A1978, A1976, A2008
To find your case size and more information, check the engraving on the back of your Apple Watch.
38mm Case Model: A1858 A1860, A1889, A1890
42mm Case Model: A1859, A1861, A1891, A1892
To find your case size and more information, check the engraving on the back of your Apple Watch.
38mm Case Model: A1757, A1816
42mm Case Model: A1758, A1817
To find your case size and more information, check the engraving on the back of your Apple Watch.
38mm Case Model: A1802
42mm Case Model: A1803
To find your case size and more information, check the engraving on the back of your Apple Watch.
38mm Case Model: A1553
42mm Case Model: A1554